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  4. Diamondback 255 / 40 20
Identify the size of your tyre
The exact dimensions of a tyre can be found on the sidewall printed mark. The graphic shows how to read properties and dimensions of the tyre:
 
/
SPEED INDEX:
The speed index indicates the maximum speed intended for the tyre. Up to this value, the manufacturer guarantees optimum operation with the appropriate tyre pressure. The maximum speed allowed for this vehicle is given in the vehicle owner's manual; this information can be used to select the appropriate speed index for the tyre. The speed index is the last mark on the sidewall of the tyre.
 
Load Index
Permissible maximum axle load per tyre in kg. To be found in the registration certificate or vehicle registration document or read directly from the tyre (two-digit number). It is permitted to fit a tyre with a higher load index.
 
Driving safety despite puncture
Runflat tyres are puncture-resistant tyres with reinforced sidewalls. This creates the so-called run-flat property. In the event of damage, this allows the vehicle to continue driving up to a distance of approx. 100 km (and even beyond depending on the product) at a maximum speed of 80 km/h, even if the pressure has been completely lost. Run-flat tyres even prevent the tyre rubber from jumping off the rim in the event of a loss of air pressure. A flat tyre is therefore still a flat tyre, but it loses some of its drama. Note: All run-flat tyres are marked with the symbol "RSC" (Runflat System Component) and may only be fitted in vehicles with a functioning air pressure control system!
 
Tyres with increased load capacity
Reinforced tyres are designed for higher loads than normal tyres. They can be identified by the designation 'RF' (reinforced) or also 'XL' or 'Extra Load'. They are used on vans, minibuses, off-road vehicles, etc. However, their mounting alone does not automatically result in higher load capacity but also requires a correspondingly higher air pressure. Furthermore, the load capacity index specified in the vehicle documents continues to apply.
 
Tyres with extra high load capacity
The "C" in the term C tyres stands for "commercial". These tyres are specially designed for commercial vehicles. These can be, for example, lighter trucks, delivery vans, flatbed trucks or panel vans. In other words: vehicles that have to move higher loads at a comparatively lower speed. The multi-ply reinforced C tyres are therefore even more load-bearing than reinforced tyres.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Tyres optimised for electric vehicles.
Tyre developed for electric vehicles. These tyres can also be used without hesitation on vehicles with other drive systems.
 

Our offer for  Diamondback  255/40  20   

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Zmax WinterHawke I
Zmax
WinterHawke I
255/40 R20 101V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance D Wet grip C Noise emissions 68 dB
just  142.01 £
In Stock
Details
Free shipping **
Sonix Winter Xpro 888
Sonix
Winter Xpro 888
255/40 R20 101V XL

Season

 Winter tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip D Noise emissions 70 dB
just  143.06 £
limited stock
Details
Free shipping **
Zelda Archforce
Zelda
Archforce
255/40 ZR20 101W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 72 dB
just  144.42 £
In Stock
Details
Free shipping **
Barum Bravuris 5HM
Barum
Barum
Bravuris 5HM
255/40 R20 101Y XL EVc, with kerbing rib

Season

 Summer tyres
2 - 4 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 73 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(3)
Average based on 3 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 3655315
(3)

Reifentest.com

just  144.91 £
limited stock
Details
Free shipping **
Gripmax Suregrip Pro Winter
Gripmax
Suregrip Pro Winter
255/40 R20 101V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 73 dB
just  146.15 £
In Stock
Details
Free shipping **
Nankang Sportnex AS-3
Nankang
Nankang
Sportnex AS-3
255/40 ZR20 101Y XL [EV+], with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 73 dB
just  147.39 £
In Stock
Details
Free shipping **
Nankang Sportnex AS-2+
Nankang
Nankang
Sportnex AS-2+
255/40 ZR20 101Y XL with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 71 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(10)
Average based on 10 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 3533612
08.10.2025 from Mark McEwan
driving to work and back, kids from school and back.
06.06.2023 from Lukasz
Nice Budget tyres with that wide and quattro drive its hard to say it lose a grip or brake bad.
02.05.2022 from Alan
Just put these on the rear of my car. The were fitted on a wet day when the roads were greasy. With the tyres being brand new I was expecting wheel spin when I put the foot down. Nope, not a bit, the tyres bit hard. Even on the motorway at 120 kph when I put the foot down I could feel the extra grip and push which added to the driving pleasure and thrill. I&#39;ve tried spinning the rear wheels in the wet but they just seem to grip really well.
(10)

Reifentest.com

just  147.57 £
In Stock
Details
Free shipping **
Linglong Sport Master C/S
Linglong
Linglong
Sport Master C/S
255/40 R20 101W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 73 dB
just  148.02 £
In Stock
Details
Free shipping **
Triangle EffeXSport TH202
Triangle
Triangle
EffeXSport TH202
255/40 R20 101Y XL EV Ready, with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 73 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 243796
26.02.2025 from Phillip Claridge
The car was supplied to me with brand new Triangle tyres - a brand I had not heard of and was not one I would have gone for but in the year that I have had them on the car, I have no complaint about their performance. I cannot say whether they would be the tyre of choice when replacement is necessary. t
(1)

Reifentest.com

just  148.07 £
limited stock
Details
Free shipping **
Petlas Prestige Sport
Petlas
Petlas
Prestige Sport
255/40 ZR20 101Y XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 70 dB
just  149.00 £
In Stock
Details
Free shipping **
Nexen N blue 4 Season 2
Nexen
Nexen
N blue 4 Season 2
255/40 ZR20 101W XL 4PR, RPB

Season

 All-season tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 73 dB
List price*  302.00 £
just  149.66 £
limited stock
Details
Free shipping **
Platin RP 430 Summer
Platin
Platin
RP 430 Summer
255/40 ZR20 101Y XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 72 dB
just  150.81 £
limited stock
Details
Free shipping **
Ilink Landroyal
Ilink
Landroyal
255/40 ZR20 101Y XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 69 dB
just  152.20 £
In Stock
Details
Free shipping **
Rovelo Avenue Sprint
Rovelo
Rovelo
Avenue Sprint
255/40 ZR20 97W

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance D Wet grip B Noise emissions 72 dB
just  152.84 £
limited stock
Details
Free shipping **
GT Radial ClimateActive
GT Radial
GT Radial
ClimateActive
255/40 R20 101Y XL, with rim protection (MFS)

Season

 All-season tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance B Wet grip A Noise emissions 73 dB
just  153.39 £
In Stock
Details
Free shipping **
Kumho Ecsta Sport S PS72
Kumho
Kumho
Ecsta Sport S PS72
255/40 ZR20 (101Y) XL with rim protection ridge (FSL)

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 72 dB
List price*  279.76 £
just  154.55 £
limited stock
Details
Free shipping **
Radar Dimax Winter
Radar
Radar
Dimax Winter
255/40 R20 101W XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance D Wet grip B Noise emissions 73 dB
just  155.07 £
In Stock
Details
Free shipping **
Laufenn S Fit 2 LK12
Laufenn
S Fit 2 LK12
255/40 ZR20 101Y XL 4PR with rim protection (MFS) SBL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 73 dB
List price*  242.00 £
just  155.25 £
In Stock
Details
Free shipping **
Nexen Winguard Sport 3
Nexen
Nexen
Winguard Sport 3
255/40 R20 101W XL 4PR EV Root, EVc, RPB

Season

 Winter tyres
2 - 4 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 73 dB
List price*  462.00 £
just  156.34 £
In Stock
Details
Free shipping **
Nankang Sportnex AS-2+
Nankang
Nankang
Sportnex AS-2+
255/40 ZR20 101Y XL with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance E Wet grip A Noise emissions 71 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(10)
Average based on 10 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 3533612
08.10.2025 from Mark McEwan
driving to work and back, kids from school and back.
06.06.2023 from Lukasz
Nice Budget tyres with that wide and quattro drive its hard to say it lose a grip or brake bad.
02.05.2022 from Alan
Just put these on the rear of my car. The were fitted on a wet day when the roads were greasy. With the tyres being brand new I was expecting wheel spin when I put the foot down. Nope, not a bit, the tyres bit hard. Even on the motorway at 120 kph when I put the foot down I could feel the extra grip and push which added to the driving pleasure and thrill. I&#39;ve tried spinning the rear wheels in the wet but they just seem to grip really well.
(10)

Reifentest.com

just  156.68 £
In Stock
Details
Free shipping **
CST Saleks E.X1
CST
CST
Saleks E.X1
255/40 R20 101Y XL CST Silent, EV, with rim protection ridge (FSL)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance B Wet grip A Noise emissions 70 dB
just  156.75 £
In Stock
Details
Free shipping **
New
Cooper Summer
Cooper
Cooper
Summer
255/40 R20 101Y XL EVR, with Rim flange protection

Season

 Summer tyres
2 - 4 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip A Noise emissions 72 dB
just  157.00 £
limited stock
Details
Free shipping **
Davanti Protoura Sport
Davanti
Protoura Sport
255/40 ZR20 101Y XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 70 dB
just  158.65 £
limited stock
Details
Free shipping **
Landsail RapidDragon
Landsail
Landsail
RapidDragon
255/40 R20 101W XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance B Wet grip B Noise emissions 73 dB
just  158.77 £
limited stock
Details
Free shipping **
Viking ProTech NewGen
Viking
Viking
ProTech NewGen
255/40 R20 101Y XL EVc, with kerbing rib

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip B Noise emissions 73 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(4)
Average based on 4 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 5167932
21.02.2026 from Alan Marshall
Fabulous tyres and exceptional wear, considering the price point of these, especially given my driving style. I&#39;ll definitely see over 20000 miles on these tyres which I find remarkable on a heavy car with over 400hp. Could I have better grip, sure for twice the price. Do you really need it, even for having fun on UK roads, no! They are soft rubber though, so you&#39;ll know if your alignment is out, these didn&#39;t last long on my Merc V Class!
08.08.2020 from Dean
Doing relatively high mileage of over 40k every year, I&#39;ve been through various different premium tyres over the years. Let me tell you, in the 5k miles on these tyres so far I&#39;d say they&#39;re pound for pound up there with premium tyres for everyday driving. I&#39;ve found them to be really good in the wet, no major drama with aquaplaning and my heavy right foot has encountered no issues in cornering. Strangely, I&#39;ve found that I&#39;m more confident with these in the wet than dry- they tend to be slightly unpredictable when pushing on. Not a massive issue by any means and shouldn&#39;t put anybody off, it&#39;s just highlighted by my spirited driving style! Wear seems to be decent so far, but as I said I&#39;ve only done 5k so far so too early to tell. All in all, great value for money and worth a try. On 20&#39;s, The Goodyear Eagle F1s that I had on previously were &pound;160 each, whereas I got these for &pound;115. 200 quid saved, and genuinely no worse performance. Well done Viking!
18.10.2019 from W Edbury
The car feels very safe cornering and braking is very good , it drives straight no wandering overall I&rsquo;m very satisfied with the set of Tyres.
(4)

Reifentest.com

just  158.98 £
In Stock
Details
Free shipping **
Triangle SnowLink PL02
Triangle
Triangle
SnowLink PL02
255/40 R20 101W XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance C Wet grip C Noise emissions 73 dB
just  160.04 £
In Stock
Details
Free shipping **
Sonix Prime A/S
Sonix
Prime A/S
255/40 ZR20 101W XL

Season

 All-season tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance C Wet grip C Noise emissions 72 dB
just  160.91 £
limited stock
Details
Free shipping **
Nexen N Fera Sport
Nexen
Nexen
N Fera Sport
255/40 ZR20 101Y XL 4PR RPB

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance D Wet grip A Noise emissions 73 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(2)
Average based on 2 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven 504298
06.10.2022 from John
Handling it depends from road quality, but never excellent. Steering feeling is good. Breaking on dry roads insufficient, ABS function even in middle breaking situations. Very low noise,
(2)

Reifentest.com

List price*  264.00 £
just  162.45 £
In Stock
Details
Free shipping **
There are 28 of 323 tyres displayed
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